Which of the following combinations is found in greater quantities in hard water?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. Calcium and Magnesium.
Hard water contains higher amounts of calcium and magnesium ions. These minerals are primarily responsible for the hardness of water. As water flows through limestone, chalk, or gypsum deposits, it dissolves these minerals, increasing their concentration. The presence of calcium and magnesium makes it difficult for soap to lather and can lead to scale buildup in pipes and appliances. In contrast, soft water has lower concentrations of these ions, making it more compatible with soaps and detergents.